CN110863788B - Hydraulic bendable nib device - Google Patents
Hydraulic bendable nib device Download PDFInfo
- Publication number
- CN110863788B CN110863788B CN201911259465.8A CN201911259465A CN110863788B CN 110863788 B CN110863788 B CN 110863788B CN 201911259465 A CN201911259465 A CN 201911259465A CN 110863788 B CN110863788 B CN 110863788B
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- China
- Prior art keywords
- bendable
- seat
- cylinder body
- cam
- piston rod
- Prior art date
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- 238000003825 pressing Methods 0.000 claims abstract description 14
- 210000002445 nipple Anatomy 0.000 claims description 21
- 238000005086 pumping Methods 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 238000010008 shearing Methods 0.000 claims description 2
- 230000008439 repair process Effects 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 2
- 208000010392 Bone Fractures Diseases 0.000 description 8
- 238000006073 displacement reaction Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 208000007356 Fracture Dislocation Diseases 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 210000002310 elbow joint Anatomy 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/10—Reconditioning of well casings, e.g. straightening
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Working Measures On Existing Buildindgs (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a hydraulic bendable nib device which comprises an upper section fixing part and a lower section bendable deflection part, wherein the upper section fixing part comprises an upper cylinder body, an upper connector and an upper connector, wherein the upper connector and the upper connector are respectively connected with the upper end and the lower end of the upper cylinder body in a threaded manner, a hollow piston rod is connected in a sliding manner in the upper cylinder body, a first nozzle is fixedly arranged at the upper end of the piston rod, a spring is sleeved on the piston rod, two ends of the spring are respectively in elastic contact with the piston rod and the upper cylinder body, a cam seat is fixedly arranged at the upper part of an inner hole of the upper connector, a cam is rotatably arranged in the cam seat through a cam pin, and a supporting seat and a ball pressing seat are fixedly arranged at the lower part of the inner hole of the upper connector. The invention can realize the lower angle change of the tool under different pump pressures, can find out the lower fracture of the oil casing of the fault broken well and complete cementing and plugging operation at one time, can improve the repair rate of the fault broken well, reduce the well repairing cost, and has great significance for repairing the fault broken oil gas well in the oil field.
Description
Technical Field
The invention relates to a hydraulic bendable nib device, and belongs to the technical field of workover tools.
Background
The hydraulic bendable nib device is used for an oil field well repairing tool, and in the middle and later stages of oil field exploitation, a plurality of underground oil sleeves are damaged, and damage conditions such as pipe column corrosion perforation, pipe column necking and pipe column dislocation exist. The pipe column fracture is caused by long production time, stratum rock slides under the action of shearing stress, oil casing is sheared and damaged, fracture dislocation translation phenomenon is caused, and well repair operation is needed to be carried out on the damaged pipe column for smooth exploitation of underground oil and gas resources. The pipe column corrosion can repair the damaged position, the pipe column necking can perform expansion operation at the inner hole necking position, and the well repairing with the pipe column dislocation is the well repairing operation with the greatest difficulty, low success rate and high cost, and particularly, no effective method is available for the large-displacement dislocation well at present. In order to find the large displacement translational fracture and make up or plug the lower fracture, a special fracture finding tool is required, and thus a new tool-hydraulic bendable nib device is developed for repairing the large displacement fractured well.
Disclosure of Invention
Aiming at the problems of high difficulty, low success rate and high cost in large-displacement fault well repairing operation, the invention provides the hydraulic bendable nib device which is ingenious in structure, convenient to use, safe and reliable, and the tool can improve the fault well repairing rate and reduce the well repairing cost.
The technical scheme of the invention is as follows: the hydraulic bendable nib device comprises an upper section fixing part and a lower section bendable deflection part, wherein the upper section fixing part comprises an upper cylinder body, an upper connector and an upper connector, wherein the upper connector and the upper connector are respectively connected with the upper end and the lower end of the upper cylinder body in a threaded manner; the lower section bendable deflection part comprises a bendable nipple installed in a ball pressing seat in a rotating mode through a short joint pin and a lower connector connected with the lower end of the bendable nipple in a threaded mode, the upper end of the bendable nipple is in sliding fit with a cam through an inclined plane, a ball head taking the short joint pin as the center is arranged on the bendable nipple, the ball head is simultaneously in sliding fit with a supporting seat and the ball pressing seat through a spherical surface, an inner hole in the lower portion of the ball pressing seat is an eccentric hole extending to a second inner spherical surface, a lower cylinder body is connected with the lower end of the lower connector in a threaded mode, a limit seat is connected with the lower end of the lower cylinder body in a threaded mode, a nib penetrating through the limit seat is installed in the lower cylinder body, the nib is simultaneously in sliding fit with the lower cylinder body and the limit seat, a second nozzle is fixedly installed in the inner hole in the upper end of the nib, an elastic opening locking ring is sleeved outside the nib, annular saw type positive teeth are arranged on the outer wall of the elastic opening locking ring, annular saw type positive teeth are matched with the annular saw type positive teeth are arranged on the inner wall of the lower cylinder body, a lower outer wall of the upper cylinder body is provided with a lower cylindrical body, a lower cylindrical body is provided with a lower cylindrical body, and a lower cylindrical body is embedded into a lower cylindrical body.
Further, a first inclined plane is arranged on the cam, a second inclined plane is arranged at the upper end of the bendable short section, and the first inclined plane is in sliding fit with the second inclined plane.
Further, the inner walls of the supporting seat and the ball pressing seat are respectively provided with a first inner spherical surface and a second inner spherical surface, and the ball head is simultaneously in sliding fit with the first inner spherical surface and the second inner spherical surface.
Further, a first elastic retainer ring clung to the first nozzle is arranged in an inner hole at the upper end of the piston rod, and a second elastic retainer ring clung to the second nozzle is arranged in an inner hole at the upper end of the pen point.
Further, the side walls of the upper cylinder body and the lower cylinder body are respectively provided with a first balance hole and a second balance hole.
Further, a retaining ring groove is formed in the outer wall of the pen point and located at the lower end of the elastic opening locking ring, and a half retaining ring is fixedly installed in the retaining ring groove.
Further, a hard alloy layer is welded on the lower end face of the limit seat.
By adopting the technical scheme, the invention has the advantages that: the hydraulic bendable nib device provided by the invention deflects and bends the lower part of the tool under the condition of low pumping pressure, bends for different angles under different pumping pressures, shears a shear pin under high pumping pressure, and the nib extends outwards and penetrates into the inner hole of the lower fracture tubular column to realize well repairing operations such as cementing and plugging. Therefore, the invention can realize the lower angle change of the tool under different pump pressures, can find out the lower fracture of the oil casing of the fault broken well and complete cementing and plugging operation at one time, not only can improve the repair rate of the fault broken well and reduce the well repairing cost, but also has extremely important significance for repairing the fault broken oil and gas well in the oil field.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic view of the structure when the circular saw type orthodontic tooth is engaged with the circular saw type anti-tooth.
The marks in the drawings are: the device comprises a 1-upper joint, a 2-upper cylinder, a 3-piston rod, a 4-spring, a 5-upper connector, a 6-cam, a 7-cam, an 8-cam seat, a 9-supporting seat, a 10-bendable nipple, a 11-short joint pin, a 12-ball pressing seat, a 13-lower connector, a 14-adjusting pad, a 15-nib, a 16-snap ring, a 17-split half-stop ring, a 18-lower cylinder, a 19-limit seat, a 20-shear pin, a 21-first nozzle, a 22-first elastic retainer, a 23-first balance hole, a 24-first inclined surface, a 25-second inclined surface, a 26-first inner spherical surface, a 27-second inner spherical surface, a 28-ball head, a 29-eccentric hole, a 30-shear pin groove, a 31-annular saw-type orthodontic tooth, a 32-stop ring groove, a 33-annular saw-type inverted tooth, a 34-second balance hole, a 35-hard alloy layer, a 36-second nozzle and a 37-second elastic retainer.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent.
Embodiments of the invention: the hydraulic bendable nib device is shown in fig. 1, and comprises an upper section fixing part and a lower section bendable deflection part, wherein the upper section fixing part comprises an upper cylinder body 2, an upper joint 1 and an upper connector 5 which are respectively connected with the upper end and the lower end of the upper cylinder body 2 in a threaded manner, a hollow piston rod 3 is connected in a sliding manner in the upper cylinder body 2, a first nozzle 21 is fixedly arranged at the upper end of the piston rod 3, a spring 4 is sleeved on the piston rod 3, two ends of the spring 4 are respectively in elastic contact with the piston rod 3 and the upper cylinder body 2, a cam seat 8 is fixedly arranged at the upper part of an inner hole of the upper connector 5, a cam 6 is rotatably arranged in the cam seat 8 through a cam pin 7, and a supporting seat 9 and a pressing seat 12 are fixedly arranged at the lower part of the inner hole of the upper connector 5; the lower section bendable deflection part comprises a bendable nipple 10 rotatably installed in a ball pressing seat 12 through a nipple pin 11 and a lower connecting body 13 in threaded connection with the lower end of the bendable nipple 10, a first inclined surface 24 is arranged on the cam 6, a second inclined surface 25 is arranged at the upper end of the bendable nipple 10, and the first inclined surface 24 is in sliding fit with the second inclined surface 25. A ball head 28 taking the nipple pin 11 as a center is arranged on the bendable nipple 10, a first inner spherical surface 26 and a second inner spherical surface 27 are respectively arranged on the inner walls of the supporting seat 9 and the ball pressing seat 12, and the ball head 28 is simultaneously in sliding fit with the first inner spherical surface 26 and the second inner spherical surface 27. The lower inner hole of the ball pressing seat 12 is an eccentric hole 29 extending to the second inner sphere 27, the lower end of the lower connecting body 13 is connected with the lower cylinder 18 in a threaded manner, the lower end of the lower cylinder 18 is connected with the limit seat 19 in a threaded manner, the pen point 15 penetrating through the limit seat 19 is arranged in the lower cylinder 18, the pen point 15 is simultaneously in sliding fit with the lower cylinder 18 and the limit seat 19, the second nozzle 36 is fixedly arranged in the inner hole at the upper end of the pen point 15, the elastic split locking ring 16 is sleeved outside the pen point 15, the outer wall of the elastic split locking ring 16 is provided with an annular saw type orthodontic tooth 31, the inner wall at the lower part of the lower cylinder 18 is provided with an annular saw type anti-tooth 33 matched with the annular saw type orthodontic tooth 31, the outer wall at the upper part of the pen point 15 is provided with a shear pin groove 30, the outer wall of the lower cylinder 18 is connected with the shear pin 20 in a threaded manner, and the lower end of the shear pin 20 is embedded in the shear pin groove 30. The inner hole at the upper end of the piston rod 3 is provided with a first elastic check ring 22 which is closely attached to the first nozzle 21, and the inner hole at the upper end of the pen point 15 is provided with a second elastic check ring 37 which is closely attached to the second nozzle 36, so that the nozzle is prevented from sliding in working engineering. The side walls of the upper cylinder 2 and the lower cylinder 18 are respectively provided with a first balance hole 23 and a second balance hole 34. The outer wall of the pen point 15 and the lower end of the elastic opening locking ring 16 are provided with a retaining ring groove 32, a half retaining ring 17 is fixedly arranged in the retaining ring groove 32, and the elastic opening locking ring 16 is prevented from moving on the pen point 15 through the half retaining ring 17. A hard alloy layer 35 is welded on the lower end surface of the limit seat 19.
The working principle of the invention is as follows:
before use, a distance is forged and milled at the staggered joint, so that enough deflection space is reserved for the hydraulic bendable nib device during deflection bending. The hydraulic bendable nib device is connected to the lower part of a drill rod, the tool hydraulic bendable nib device is fed into a forging milling position with a staggered port by a drill down drill, a pump is started and the pump pressure is gradually increased, when pumping fluid flows through a first nozzle 21 on a piston rod 3, the fluid generates certain pressure drop through the throttling action of the first nozzle 21, a first balance hole 23 of an upper cylinder 2 is connected with an external annulus, the upper end surface of the piston rod 3 is a high pressure area of the fluid in the inner diameter of the tool, a step part of a spring 4 of the piston rod 3 is connected with the external annulus through the first balance hole 23 to form a low pressure area, therefore, pressure difference also exists at the two ends of the piston rod 3, the pressure difference can push the piston rod 3 to compress the spring 4 downwards, when the lower part of the piston rod 3 is attached to a cam 6 to continue to downwards, the cam 6 rotates along a cam pin 7, at the moment, the first inclined surface 24 of the cam 6 acts on a second inclined surface 25 of the bendable nipple 10, the first inclined surface 24 and the second inclined surface 25 relatively slide, so that the bendable nipple 10 rotates along with the first spherical surface 12 on a ball seat 9, the spherical surface 26 and the spherical surface of the ball seat 10 are also driven to rotate along with the second inclined surface 25, and the eccentric angle of the elbow seat 10 is increased, and the angle of the elbow seat 10 can be deflected along with the spherical surface 10, and the eccentric joint 10 is deflected downwards, and the angle is increased, and the angle of the elbow seat 10 is also greatly when the elbow joint 10 is deflected. The drill rod is lifted and lowered by short distance while being rotated in a trial mode in the process of gradually increasing the pumping pressure, and when the lowering distance is increased, the lower part of the limiting seat 19 can be judged to be deep into the inner hole of the lower pipe tool, so that the lower fracture of the pipe tool is found out. The pumping pressure is continuously increased, a certain pressure difference exists at two ends of the pen point 15 in the same way, when the pumping pressure reaches a certain value, the shear pin 20 is sheared under the action of the pressure difference, the pen point 15 is pushed to move downwards, when the half baffle ring 17 is attached to the upper end face of the limit seat 19, the maximum movement stroke of the pen point 19 is completed, and at the moment, the elastic opening lock ring 16 is elastically released by being bound, the annular saw-shaped orthodontic tooth 31 on the outer wall of the elastic opening lock ring 16 is meshed with the annular saw-shaped anti-tooth 33 on the lower cylinder 18, so that the pen point 15 can be prevented from moving upwards when being pressed, the front end of the pen point 15 penetrates deep into the inner diameter of a lower fracture of the pipe, and well repairing operations such as cementing blocking can be performed at the moment. When the pump is stopped, the compressed spring 4 is elastically released, the piston rod 3 is pushed to ascend, the pressure acting on the cam 6 is relieved, the drill rod is lifted up, the lower bendable deflection part is retracted after being deflected by an angle under the action of gravity, and the whole well repairing operation can be started.
Claims (5)
1. The utility model provides a hydraulic pressure flexible nib device, includes upper segment fixed part and the flexible deflection portion of hypomere, its characterized in that: the upper section fixing part comprises an upper cylinder body (2), an upper joint (1) and an upper connecting body (5) which are respectively connected with the upper end and the lower end of the upper cylinder body (2) in a threaded manner, a hollow piston rod (3) is connected in a sliding manner in the upper cylinder body (2), a first nozzle (21) is fixedly arranged at the upper end of the piston rod (3), a spring (4) is sleeved on the piston rod (3), the two ends of the spring (4) are respectively in elastic contact with the piston rod (3) and the upper cylinder body (2), a cam seat (8) is fixedly arranged at the upper part of an inner hole of the upper connecting body (5), a cam (6) is rotatably arranged in the cam seat (8) through a cam pin (7), and a supporting seat (9) and a pressing seat (12) are fixedly arranged at the lower part of the inner hole of the upper connecting body (5); the lower section bendable deflection part comprises a bendable nipple (10) rotatably installed in a ball pressing seat (12) through a nipple pin (11) and a lower connecting body (13) connected to the lower end of the bendable nipple (10) in a threaded manner, the upper end of the bendable nipple (10) is in sliding fit with a cam (6) through an inclined plane, a ball head (28) taking the nipple pin (11) as the center is arranged on the bendable nipple (10), the ball head (28) is simultaneously in sliding fit with a supporting seat (9) and the ball pressing seat (12) through a spherical surface, an inner hole at the lower part of the ball pressing seat (12) is an eccentric hole (29) extending to a second inner spherical surface (27), a lower cylinder (18) is connected to the lower end of the lower connecting body (13) in a threaded manner, a limit seat (19) is connected to the lower end of the lower cylinder (18) in a threaded manner, a ball head (28) taking the nipple pin (11) as the center is arranged on the bendable nipple (10), the ball head (28) is simultaneously in sliding fit with the lower cylinder (18) and the limit seat (19) in a sliding manner, an inner hole (31) extending to a second inner spherical surface (27) is arranged at the lower end of the lower connecting body (13), an elastic thread sleeve (16) is arranged at the lower end of the lower cylinder (18) in a threaded manner, an elastic thread sleeve is arranged at the outer end of the nib (16) of the pen point (16) and an elastic thread sleeve is arranged at the outer end of the pen point (16), an annular saw-shaped reverse tooth (33) matched with the annular saw-shaped orthodontic tooth (31) is arranged on the inner wall of the lower part of the lower cylinder body (18), a shear pin groove (30) is formed on the outer wall of the upper part of the pen point (15), a shear pin (20) is connected on the outer wall of the lower cylinder body (18) in a threaded manner, and the lower end of the shear pin (20) is embedded into the shear pin groove (30); the two ends of the pen point (15) have pressure difference, when the pumping pressure reaches a certain value, the shearing pin (20) is sheared under the action of the pressure difference, and the pen point (15) is pushed to move downwards; the side walls of the upper cylinder body (2) and the lower cylinder body (18) are respectively provided with a first balance hole (23) and a second balance hole (34); a retaining ring groove (32) is formed in the outer wall of the pen point (15) and positioned at the lower end of the elastic opening locking ring (16), and a half retaining ring (17) is fixedly arranged in the retaining ring groove (32).
2. The hydraulically bendable nib device according to claim 1, wherein: the cam (6) is provided with a first inclined plane (24), the upper end of the bendable short joint (10) is provided with a second inclined plane (25), and the first inclined plane (24) is in sliding fit with the second inclined plane (25).
3. The hydraulically bendable nib device according to claim 1, wherein: the ball head (28) is simultaneously in sliding fit with the first inner spherical surface (26) and the second inner spherical surface (27).
4. The hydraulically bendable nib device according to claim 1, wherein: a first elastic check ring (22) which is closely attached to the first nozzle (21) is arranged in an inner hole at the upper end of the piston rod (3), and a second elastic check ring (37) which is closely attached to the second nozzle (36) is arranged in an inner hole at the upper end of the pen point (15).
5. The hydraulically bendable nib device according to claim 1, wherein: and a hard alloy layer (35) is welded on the lower end surface of the limit seat (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911259465.8A CN110863788B (en) | 2019-12-10 | 2019-12-10 | Hydraulic bendable nib device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911259465.8A CN110863788B (en) | 2019-12-10 | 2019-12-10 | Hydraulic bendable nib device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110863788A CN110863788A (en) | 2020-03-06 |
| CN110863788B true CN110863788B (en) | 2023-11-28 |
Family
ID=69658709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911259465.8A Active CN110863788B (en) | 2019-12-10 | 2019-12-10 | Hydraulic bendable nib device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110863788B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5154243A (en) * | 1991-07-26 | 1992-10-13 | Dudman Roy L | Bent sub |
| WO1994018429A1 (en) * | 1993-02-01 | 1994-08-18 | Magne Petter Nilsen | Sealing device for sealing of holes in the wall of a pipe in a curved oil well, an anchoring device for the sealing device and a tool for mounting of the sealing device and the anchoring device |
| CN2769505Y (en) * | 2005-02-23 | 2006-04-05 | 东营凯维石油科技有限责任公司 | Expanding antileaking flushing device |
| CN102635323A (en) * | 2011-03-14 | 2012-08-15 | 大庆油田有限责任公司 | Moveable combination of guide rod and milling cone |
| CN202441299U (en) * | 2012-03-08 | 2012-09-19 | 中国石油天然气股份有限公司 | Suspended fracture stabilizer |
| CN203022683U (en) * | 2012-12-26 | 2013-06-26 | 安东石油技术（集团）有限公司 | Composite rubber sleeve packer |
| CN103277059A (en) * | 2013-05-30 | 2013-09-04 | 中国石油天然气股份有限公司 | Negative pressure combined-sand-washing and forced-sand-draining device |
| CN103643901A (en) * | 2013-12-03 | 2014-03-19 | 中国石油天然气股份有限公司 | Directional joint for well repairing and bushing removing in oil field |
| CN104912506A (en) * | 2015-06-24 | 2015-09-16 | 长江大学 | Variable bent joint |
| CN204960840U (en) * | 2015-09-14 | 2016-01-13 | 中国石油集团长城钻探工程有限公司 | Branch's well bendable toggle instrument |
| CN108412445A (en) * | 2018-05-21 | 2018-08-17 | 中国石油天然气股份有限公司 | The special long conical surface looks for channel pen tip milling cone |
| CN110374536A (en) * | 2019-08-09 | 2019-10-25 | 新疆格瑞迪斯石油技术股份有限公司 | A kind of casing firing milling tool |
| CN211287584U (en) * | 2019-12-10 | 2020-08-18 | 贵州高峰石油机械股份有限公司 | Hydraulic bendable pen point |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107429542B (en) * | 2015-02-24 | 2019-07-05 | 特种油管有限责任公司 | Hydraulic jet nozzle and guidance system are manipulated for down hole drill device |
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2019
- 2019-12-10 CN CN201911259465.8A patent/CN110863788B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5154243A (en) * | 1991-07-26 | 1992-10-13 | Dudman Roy L | Bent sub |
| WO1994018429A1 (en) * | 1993-02-01 | 1994-08-18 | Magne Petter Nilsen | Sealing device for sealing of holes in the wall of a pipe in a curved oil well, an anchoring device for the sealing device and a tool for mounting of the sealing device and the anchoring device |
| CN2769505Y (en) * | 2005-02-23 | 2006-04-05 | 东营凯维石油科技有限责任公司 | Expanding antileaking flushing device |
| CN102635323A (en) * | 2011-03-14 | 2012-08-15 | 大庆油田有限责任公司 | Moveable combination of guide rod and milling cone |
| CN202441299U (en) * | 2012-03-08 | 2012-09-19 | 中国石油天然气股份有限公司 | Suspended fracture stabilizer |
| CN203022683U (en) * | 2012-12-26 | 2013-06-26 | 安东石油技术（集团）有限公司 | Composite rubber sleeve packer |
| CN103277059A (en) * | 2013-05-30 | 2013-09-04 | 中国石油天然气股份有限公司 | Negative pressure combined-sand-washing and forced-sand-draining device |
| CN103643901A (en) * | 2013-12-03 | 2014-03-19 | 中国石油天然气股份有限公司 | Directional joint for well repairing and bushing removing in oil field |
| CN104912506A (en) * | 2015-06-24 | 2015-09-16 | 长江大学 | Variable bent joint |
| CN204960840U (en) * | 2015-09-14 | 2016-01-13 | 中国石油集团长城钻探工程有限公司 | Branch's well bendable toggle instrument |
| CN108412445A (en) * | 2018-05-21 | 2018-08-17 | 中国石油天然气股份有限公司 | The special long conical surface looks for channel pen tip milling cone |
| CN110374536A (en) * | 2019-08-09 | 2019-10-25 | 新疆格瑞迪斯石油技术股份有限公司 | A kind of casing firing milling tool |
| CN211287584U (en) * | 2019-12-10 | 2020-08-18 | 贵州高峰石油机械股份有限公司 | Hydraulic bendable pen point |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110863788A (en) | 2020-03-06 |
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